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Zbl 0691.68078
Krutský, František
Reducibility and correspondences of pure generalized grammars. (English)
[J] Acta Univ. Palacki. Olomuc., Fac. Rerum Nat., Math. 27, 63-84 (1988). ISSN 0231-9721

Summary: Beside other results a question is solved, how the reducing operators behave at surjective homomorphisms of special generalized grammars and at correspondences inverse to such homomorphisms. But some theorems which were proved only for mappings can be proved more generally for certain correspondences between special generalized grammars. These correspondences will be called important correspondences. The concept of a homomorphic correspondence is more general than the concept of a homomorphism.
MSC 2000:
*68Q45 Formal languages

Keywords: generalized grammars; correspondences

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